mButton.setonClickListener(new View.onClickListener() { public void onClick(View v) {new UploadImageTask().execute(); // initialize asynchronous task}});//Now implement Asynchronous Taskpublic class Get_User_Data extends AsyncTask<Void, Void, Void> { private final ProgressDialog dialog = new ProgressDialog( MyActivity.this); protected void onPreExecute() { this.dialog.setMessage("Loading..."); this.dialog.setCancelable(false); this.dialog.show(); } @Override protected Void doInBackground(Void... params) { uploadImage(); // inside the method paste your file uploading pre return null; } protected void onPostExecute(Void result) { // Here if you wish to do future process for ex. move to another activity do here if (dialog.isShowing()) { dialog.dismiss(); } } }有关更多信息，请参考此链接 http://vikaskanani.wordpress.com/2011/01/29/android-image-
upload-activity/
